Conductor for transformers



June 3, 1930. A. A. SKVORTZOFF CONDUCTOR FOR TRANSFORMERS Original FiledSept. 2. 1926 0| m 7 RT r W N A r e d m X m A WINSS 5:

ATT-RNEY Patented June 3,- 1930 ,UNITED STATES PATENT OFFICE ALEXANDERA. sxvonrzorr, or SHARON,

novsn ELECTRIC VANIA q CONDUCTOR non PENNSYLVANIA, ASSIGNOR TO WESTING:

& MANUFACTURING COMPANY, A. CORPORATION OF PENNSYL- TRAN SFORMEBSApplication filed September 2, 1926, Serial No. 133,101. Renewed January18, 1929.

My invention relates to oil insulated apparatus and particularly tomeans for preventing the creepage of oil from such apparatus along theconductors passing through the walls thereof.

One object of my invention is to provide an internal conductor foroil-immersed electrical apparatus that shall prevent the creepage of oilalong the insulating material surrounding the conductor.

Another object of my invention is to provide a conductor foroil-immersed electrical apparatus, that shall have the continuity of theinsulating material interrupted for the purpose of preventing thecreepage of oil along the conductor by a siphonic and capillary action.

In electrical oil insulated apparatus in which the electrical conductorsare passed directly through a bushing, trouble is frequently experiencedby reason of the creepage of the oil outwardly of the apparatus alongthe insulating material surrounding the conductors. i

I propose to eliminate the foregoing difliculty by interrupting thecontinuity of the insulating material surrounding the. conductors at thelevel of the insulating liquid by interposing a body of non-porous material around the metallic part of the conductor.

In the accompanying drawings, n

Fig. 1 is a view, partially in elevation and partially in section, of anelectrical transformer embodying my invention; 7

Fig. 2 is a sectional view of one form of my invention; and I V Fig. 3is a sectional View of a modified form oi my invention.

My invention comprises, in general, a casing 1 in which is mounted anelectrical de-. vice 2, such as a transformer, that is surrounded by abody of insulating oil 3 and which is connected externally of the casing1 by conductors 4 that pass through suitable bushings 5.

The conductors 4 are provided with sections 6 of non-porous materialsecured directly to the metal of the conductor from which the porousinsulating material has been removed, for preventing the creepage of theoil 3 along the porous insulating material 7 surrounding the portions ofconductors 4 extending through the bushings 5.

Referring to Fig. 2, the section 6 is preferably made of micarta, or anyother non.- porous insulating material mounted on the metallic portionof the conductor 4, and is placed at the normal level of the insulatingoil 3. Since the section 6 is of non-porous material, the creepage orflow of the insulating oil 3 upwardly along the conductor 4 andinsulating material 7 is prevented.

Referring to Fig. 3 I have shown a modified form 0f my invention inwhich the nonporous section is formed by aplurality of layers of micartapaper 8 rolled upon the conductor 4. The operation of this form of myinvention is substantially the same as that shown in Fig. 2. I

Accordingly, I have provided ameans for preventing the creepage or flowof insulating oil from electrical apparatus which provides forinterrupting the continuity of the porous insulating material normallysurrounding such conductors and replacing it with a non-porous sectionof insulating material that is disposed at the normal level of theinsulating fluid.

While I have described and illustrated but two embodiments of myinvention, it will be obvious to those skilled in the art that variouschanges, modifications, substitutions, additions and omissions may bemade in the apparatus illustrated without departing from the spirit andscope of the invention, as set forth in the appended claims.

I claim as my invention:

1. In combination, a casing, a liquid therein, and a wire having acoating of porous ma terial extending through the casing and into theliquid, of a section of non-porous material inserted into the coating atapproximately the level of the liquid to prevent siphoning and capillaryactions in the coating.

2. In combination, a casing for an electri cal device, a liquid therein,and a conductor having a coating of porous insulating materail extendingthrough the casing and into the liquid, of a section of non-porousmaterial inserted into the coatingand a ortion only of which is disposedabove the evel of the liquid to prevent siphoning and capillary actionsinthe coating.

r 3. In combination, a casing for an electrical device,-a liquidtherein, and a conductor having a coatin of porous insulating materialextending t rough the casing and into Y i the liquid, of a section ofnon-porous material interrupting the' continuity of the insulatingmaterial at the level of the liquid for preventing creepage of theliquid along the insulating material. p

4. In combination, an electrical conductor, insulating materialsurrounding "a portion oi said conductor, and means for preventing thecreepage of liquid along the insulating material surrounding theconductor, comprising a body of non-porous material around theconductor.

5. In combination, an electrical conductor, insulating materialsurrounding a portion of said conductor, and a body of non-porousmaterial around a section of the conductor to prevent the creepage ofliquid along the conductor.

In testimony whereof, I have hereunto subicziaed my name this 13th dayof August,

, ALEXANDER A. SKVORTZOFF.

